2013 Southern Division Spring Meeting, Nashville, Tennessee
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ABSTRACTS FOR THE SPRING MEETING OF THE SOUTHERN DIVISION OF THE AMERICAN FISHERIES SOCIETY NASHVILLE, TENNESSEE 7-10 FEBRUARY 2013 ABSTRACT 13002 New Life for a Tailwater Trout Fishery: Case study of water-quality conditions below Tenkiller Ferry Reservoir Jim Burroughs; Oklahoma Department of Wildlife Conservation, Porter, Oklahoma 74454; [email protected] Xin Jin; Oklahoma Cooperative Fish & Wildlife Research Unit, Oklahoma State University, 007 Agriculture Hall, Oklahoma State University, Stillwater, Oklahoma 74078; [email protected] Shannon K. Brewer; U.S. Geological Survey, Oklahoma Cooperative Fish & Wildlife Research Unit, 007 Agriculture Hall, Oklahoma State University, Stillwater, Oklahoma 74078; [email protected] Josh Johnston; Oklahoma Department of Wildlife Conservation, Porter, Oklahoma 74454; [email protected] Brandon Brown; Oklahoma Department of Wildlife Conservation, Porter, Oklahoma 74454; [email protected] Abstract- Tenkiller Ferry is a 5,220 ha reservoir on the Illinois River in eastern Oklahoma that was impounded for flood control and hydroelectric power. Rainbow trout were established as the primary mitigation for the loss of the warm-water fishery in the lower Illinois River. No instream flow standards or water storage have been allocated to support the trout fishery; however, the fishery was historically maintained by dam leakage and donation of water rights. Recently, the dam leak was corrected and donated waters are in jeopardy. Less reliable water resulted in an increase in violations of state water-quality standards. Trout stockings were suspended in 2011 for the second time in 60 years as a result of insufficient water quantity and quality. Concern from local anglers and some state and federal legislators coupled with two documented fish kills in 2011 led to the development of two new engineering options and increased inter-agency cooperation in an attempt to prevent future fish kills. Temperature and dissolved-oxygen conditions were collected continuously through the summer months at several locations from the dam downstream approximately 10 km. Flow, dissolved oxygen, and temperature data were used to calibrate a model predicting dissolved oxygen as a function of discharge to recommend a summer minimum flow. Cooperation by both agencies to obtain feasible management options will allow continued sustainability of this economically-important fishery. Presenter: Jim Burroughs Contact Person: Same Type of Presentation: Oral ABSTRACT 13003 Comparison of the precision of ages from three techniques and back-calculated lengths for introduced blue catfish Michael D. Homer Jr., Georgia Cooperative Fish and Wildlife Research Unit, The University of Georgia, 180 East Green Street, Athens, GA 30602 [email protected] Cecil A. Jennings, U.S. Geological Survey, Georgia Cooperative Fish and Wildlife Research Unit, The University of Georgia, 180 East Green Street, Athens, GA 30602 [email protected] James T. Peterson, U.S. Geological Survey, Oregon Cooperative Fish and Wildlife Research Unit, Oregon State University, 104 Nash Hall, Corvallis, Oregon 97331-3803 [email protected] ABSTRACT.- Age and growth information is used to understand life history and ecology of catfish populations and monitor their trends. Such information is useful for evaluating the success of establishment of introduced populations. Prior studies have validated age determination methods for various catfishes, but none have been validated for blue catfish. We compared precision of age estimates and back-calculated growth after using one lethal and two non-lethal age determination techniques for introduced blue catfish in Georgia. Blue catfish (n=153) were collected by experimental gillnets set overnight at 12 standardized stations at Lake Oconee, Georgia. Two non-lethal techniques requiring the pectoral spines (articulating process and basal recess) and one lethal technique requiring lapilli were used to determine the ages of the fish. The Frasier-Lee method was used to back-calculate growth for each fish. Hierarchical linear models were used to compare precision of back-calculated length estimates and growth among the three techniques. Two readers found the highest precision for otolith-based age assignments (83.5%) and lowest for basal recess cross-sections (71.4%). The models indicated that back- calculated length was variable among fish from ages 1-3 for the techniques compared; otoliths and basal recesses yielded variable lengths at age-8.. Our study suggests the articulating process and otolith techniques would are adequate for age determination of blue catfish. Presenter: Cecil Jennings Contact Person: same Type of Presentation: Poster ABSTRACT 13004 A Comparison of Reproductive Potential of Red Snapper Natural and Artificial Habitats in the Northern Gulf of Mexico Hilary Glenn; Department of Oceanography and Coastal Sciences, LSU, Baton Rouge, Louisiana, 70803; [email protected] Dannielle Kulaw; Department of Oceanography and Coastal Sciences, LSU, Baton Rouge, Louisiana, 70803; [email protected] James H. Cowan, Jr.; Department of Oceanography and Coastal Sciences, LSU, Baton Rouge, Louisiana, 70803; [email protected] Abstract- Few quantitative studies of red snapper (Lutjanus campechanus) reproduction have been conducted on the offshore natural hard bottom (NH) banks in the northern Gulf of Mexico. Information on reproductive potential is important to management of this valuable fishery and can help identify stock recovery or signs of overexploitation. The first goal of this study was to better understand the reproductive effort of red snapper in offshore NH habitats, using the gonadosomatic index (GSI). GSI is indicative of the amount of energy a fish invests in reproduction per body weight; thus a larger GSI corresponds with a greater reproductive effort. The second goal was to explore possible differences in red snapper reproduction between NH sites and artificial habitats (AH). Comparing these two habitats is important because while most studies of red snapper come from AHs, NH habitats are thought to be the historic centers of abundance for the species. Quarterly samples of red snapper were taken from three NH sites and three AH sites, using vertical long lines and single hook lines. All female red snapper were measured for total length, total weight, and eviscerated body weight. Ovaries were removed, weighed, and preserved for preparation of histological slides. GSI was plotted against time to examine seasonal changes in reproductive effort among sites and differences between habitats were assessed using ANOVA. As expected, GSI was greatest during the known peak months of spawning seasons (June, July, and August) at all sites. Presenter: Hilary Glenn Contact Person: Same Type of Presentation: Poster ABSTRACT 13005 Investigating the Relationship Between Smallmouth Bass Recruitment and Flow Characteristics in Ozark Streams Brandon Brown; Oklahoma Department of Wildlife Conservation, Porter, OK 74454; [email protected] Shannon Brewer; USGS Oklahoma Cooperative Fish and Wildlife Research Unit, Oklahoma State University, Stillwater, OK 74078; [email protected] Jim Burroughs; Oklahoma Department of Wildlife Conservation, Porter, OK 74454; [email protected] Josh Johnston; Oklahoma Department of Wildlife Conservation, Porter, OK 74454; [email protected] Abstract - A paucity of information exists about the recruitment dynamics of smallmouth bass in general and certainly for genetically-distinct populations such as Neosho smallmouth bass. The Neosho subspecies Micropterus dolomieu velox is native to the Arkansas River basin of northeast Oklahoma, southeast Kansas, southwest Missouri, and northwest Arkansas. We began a multi-year project in autumn 2012 to evaluate the temporal and spatial dynamics of smallmouth bass recruitment and the possible relation among reproductive success, age-0 survival and stream-flow dynamics. Five Ozark streams were sampled in late September and early October using visual-observation techniques. Densities of young-of-year fish were estimated in different hydraulic channel units and then a combined density was calculated by weighting densities via the proportion of channel units available throughout the reach. U.S. Geological Survey stream gauge records were summarized using the Hydrological Index Tool and analyzed to determine relationships among smallmouth bass densities and a variety of flow characteristics. We present a summary of our first year results and present the next step of evaluating the use of side-scan sonar for detecting smallmouth bass nests. Ultimately, recruitment will be assessed using both the adult and juvenile life stage relative to flow dynamics. Presenter: Brandon Brown Contact Person: Same Type of Presentation: Oral ABSTRACT 13006 Identifying the Current Distribution of Shovelnose Sturgeon in Eastern Oklahoma: The First Assessment at the Southwestern Extent of the Species Range Josh Johnston; Oklahoma Department of Wildlife Conservation, Porter, Oklahoma 74454 [email protected] Shannon K. Brewer; U.S. Geological Survey, Oklahoma Cooperative Fish & Wildlife Research Unit, 007 Agriculture Hall, Oklahoma State University, Stillwater, Oklahoma 74078; Brandon Brown; Oklahoma Department of Wildlife Conservation, Porter, Oklahoma 74454; Jim Burroughs; Oklahoma Department of Wildlife Conservation, Porter, Oklahoma 74454; [email protected] Abstract - Shovelnose sturgeon, a potamodromous species, and a species of